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EP 1 676 404 B1 |
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EUROPEAN PATENT SPECIFICATION |
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Mention of the grant of the patent: |
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23.01.2013 Bulletin 2013/04 |
(22) |
Date of filing: 12.10.2004 |
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(51) |
International Patent Classification (IPC):
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International application number: |
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PCT/IB2004/052064 |
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International publication number: |
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WO 2005/039120 (28.04.2005 Gazette 2005/17) |
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COMMUNICATION SYSTEM AND ANTI-COLLISION METHOD
KOMMUNIKATIONSSYSTEM UND ANTIKOLLISIONSVERFAHREN
SYSTEME DE TELECOMMUNICATIONS ET PROCEDE ANTI-COLLISION
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Designated Contracting States: |
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AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PL PT RO SE SI SK TR
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Priority: |
15.10.2003 EP 03103822
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Date of publication of application: |
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05.07.2006 Bulletin 2006/27 |
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Proprietor: Navigator Remote Limited Liability Company |
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Wilmington DE 19808 (US) |
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Inventors: |
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- AMTMANN, Franz
A-1101 Vienna (AT)
- SCHERABON, Christian
A-1101 Vienna (AT)
- WATZINGER, Hubert
A-1101 Vienna (AT)
- BRANDL, Roland
A-1101 Vienna (AT)
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(74) |
Representative: Small, Gary James et al |
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Carpmaels & Ransford
One Southampton Row London
WC1B 5HA London
WC1B 5HA (GB) |
(56) |
References cited: :
US-A- 5 968 154 US-A1- 2003 188 003
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US-A1- 2003 181 204
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Note: Within nine months from the publication of the mention of the grant of the European
patent, any person may give notice to the European Patent Office of opposition to
the European patent
granted. Notice of opposition shall be filed in a written reasoned statement. It shall
not be deemed to
have been filed until the opposition fee has been paid. (Art. 99(1) European Patent
Convention).
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[0001] The invention relates to a receiving method for the contactless reception of identification
information, which has been stored in a data carrier and which can be transferred
from the data carrier in a contactless manner in the form of information units to
a communication device and can be received with the communication device, said receiving
method having the steps presented in the following, namely receiving an information
unit and detecting that the information unit received represents a collision of two
different information units occurring essentially simultaneously, and of which two
different information units the first information unit originates from a first data
carrier and the second information unit originates from a second data carrier.
[0002] The invention further relates to a method of delivery for the contactless delivery
of identification information, said identification information being stored in a data
carrier and being transmissible from the data carrier in a contactless manner in the
form of information units to a communication device, and said method of delivery having
the steps presented in the following, namely delivery of an information unit.
[0003] The invention further relates to an anti-collision method comprising a receiving
method of the type presented in the first paragraph above and comprising a method
of delivery of the type presented in the second paragraph above.
[0004] The invention further relates to a communication device circuit for a communication
device, said communication device being designed for contactless communication with
a data carrier, and in which data carrier identification information is stored, which
can be received from the data carrier in a contactless manner in the form of information
units, wherein first receiving means are provided, which are designed for contactless
reception of an information unit, and wherein collision detection means are provided,
which are designed for detecting that the received information unit represents a collision
of two different information units occurring essentially simultaneously, and of which
two different information units the one information unit originates from a first data
carrier and the other information unit originates from a second data carrier.
[0005] The invention further relates to a communication device with a communication device
circuit of the type presented in the fourth paragraph.
[0006] The invention further relates to a data carrier circuit for a data carrier, said
data carrier being designed for contactless communication with a communication device
in which data carrier identification information is stored, which can be transferred
from the data carrier in a contactless manner in the form of information units to
the communication device, and second delivery means are provided, which are designed
for delivery of an information unit in a contactless manner.
[0007] The invention further relates to a data carrier with a data carrier circuit of the
type presented in the sixth paragraph.
[0008] The invention further relates to a communication system for contactless communication
comprising a communication device, which has a communication device circuit of the
type presented in the fourth paragraph, and comprising at least one data carrier,
which has a data carrier circuit according to the circuit presented in the sixth paragraph.
[0009] Such a receiving method of the type presented in the first paragraph at the beginning
and said method of delivery of the type presented in the second paragraph at the beginning
and said anti-collision method of the type presented in the third paragraph at the
beginning and said communication device circuit of the type presented in the fourth
paragraph at the beginning and said communication device of the type presented in
the fifth paragraph at the beginning and said data carrier circuit of the type presented
in the sixth paragraph at the beginning and said data carrier of the type presented
in the seventh paragraph at the beginning and said communication system of the type
presented in the eighth paragraph at the beginning are known from patent document
US 5,761,570.
[0010] In the known communication system, by means of which the known anti-collision method
can be carried out, in which anti-collision method the known receiving method can
be carried out by means of the known communication device, which has the known communication
device circuit, and in which anti-collision method the known method of delivery can
be carried out by means of the known data carrier, which has the known data carrier
circuit, it is envisaged that an information unit is received at the communication
device. On the basis of the received information unit it is then detected, if appropriate,
that the received information unit represents a collision of two different information
units occurring essentially simultaneously, and of these two different information
units the one information unit originates from a first such known data carrier and
the other information unit originates from a second such known data carrier. A so-called
collision is thus detected in this case of operation.
[0011] In the known communication system there is the problem that after detection of a
collision of information units occurring essentially simultaneously, but being different
from one another, a display signal which is only provided for displaying this collision,
is delivered from the communication device by means of a carrier signal generated
in and delivered by the communication device. The display signal can be received and
processed by the at least two data carriers. In this connection there is the additional
problem that the display signal received with the data carrier is used for complete
termination of delivery of the colliding identification information and that the further
delivery of identification information can be resumed at the earliest only after expiry
of a calculated time interval using a random number. After this time interval has
elapsed, complete identification information is delivered again, from the data carrier
for which the shortest time interval was calculated. To avoid causing a collision
again during this delivery of the identification information, the communication device
must deliver a further signal, namely a so-called "busy signal", shortly after beginning
again to receive information units of the identification information, so that all
other remaining data carriers remain silent, until they again receive queries regarding
their identification information, after the identification information of the data
carrier favored by the shortest time interval has been transmitted completely. After
that, the remaining data carriers again begin transmitting their identification information
simultaneously if applicable, until a collision is detected again and a data carrier
has been selected again from the group of remaining data carriers by calculating the
shortest time interval from this group. This method, which is generally known as an
anti-collision method or inventory technique, is repeated until all data carriers
have delivered their identification information completely and in particular without
occurrence of a collision. Such a method is disclosed in document
US-5968154. In this case there is the problem that calculation of said random number is time-consuming
and appropriate means are required in the data carrier. Furthermore, said data carrier
and said communication device are in practice unsuitable for applications in which
a relatively large number of said data carriers are accommodated practically simultaneously
within a communication zone of the communication device and the identification information
from all data carriers must be detected as quickly as possible. In said application
the time-consuming process of waiting for expiry of the time interval and the subsequent
repeat delivery of the complete identification information are disadvantageous, because
quick and efficient transmission of all identification information to the communication
device is simply not possible.
[0012] It is an object of the invention to avoid the problems described above in a receiving
method of the type presented in the first paragraph at the beginning and said method
of delivery of the type presented in the second paragraph at the beginning and said
anti-collision method of the type presented in the third paragraph at the beginning
and said communication device circuit of the type presented in the fourth paragraph
at the beginning and said communication device of the type presented in the fifth
paragraph at the beginning and said data carrier circuit of the type presented in
the sixth paragraph at the beginning and said data carrier of the type presented in
the seventh paragraph at the beginning and said communication system of the type presented
in the eighth paragraph at the beginning and to create an improved receiving method
and an improved method of delivery and an improved anti-collision method and an improved
communication device circuit and an improved communication device and an improved
data carrier circuit and an improved data carrier and an improved communication system.
[0013] To solve the problem presented above, in a receiving method according to the invention,
features according to the invention are provided, so that a receiving method according
to the invention can be characterized as follows:
A receiving method for contactless reception of identification information which is
stored in a data carrier and which can be transferred from the data carrier in a contactless
manner in the form of information units to a communication device and can be received
with the communication device, said receiving method having the steps presented below,
namely reception of an information unit and detection that the received information
unit represents a collision of two different information units occurring essentially
simultaneously, and of which two different information units the first information
unit originates from a first data carrier and the second information unit originates
from a second data carrier, and replacing the received information unit with a first
replacement information unit established by the communication device, which is used
instead of the information unit representing the collision, as the information unit
that originates from the first data carrier, and delivery of the first replacement
information unit in a contactless manner.
[0014] To solve the problem presented above, in a method of delivery according to the invention
features according to the invention are provided, so that a method of delivery according
to the invention can be characterized as follows:
Method of delivery for the contactless delivery of identification information, which
identification information is stored in a data carrier and can be delivered in a contactless
manner in the form of information units from the data carrier to a communication device,
said method of delivery having the steps listed below, namely delivery of an information
unit and checking whether, after delivery of the information unit, a first replacement
information unit established by the communication device can be received from the
communication device, and continuation of delivery of the identification information
with the information unit following the information unit previously transmitted to
the communication device, if either no established first replacement information unit
is received from the communication device or a first replacement information unit
established by the communication device is received and the received established first
replacement information unit is identical with the information unit previously transmitted
to the communication device.
[0015] To solve the problem described above, in an anti-collision method according to the
invention it is envisaged that the anti-collision method according to the invention
comprises a receiving method according to the invention and a method of delivery according
to the invention.
[0016] To solve the problem described above, in a communication device circuit according
to the invention, features according to the invention are provided, so that a communication
device circuit according to the invention can be characterized as follows:
A communication device circuit for a communication device, said communication device
being designed for contactless communication with a data carrier, and in which data
carrier identification information is stored, which can be received from the data
carrier in a contactless manner in the form of information units, first receiving
means being provided, which are designed for contactless reception of an information
unit, and collision detection means being provided, which are designed for detecting
that the received information unit represents a collision of two different information
units occurring essentially simultaneously, and of which two different information
units, the one information unit originates from a first data carrier and the other
information unit originates from a second data carrier, and wherein replacing means
are provided, which are designed for replacing the received information unit with
a first replacement information unit established by the communication device, said
first replacement information unit serving as the information unit that originates
from the first data carrier instead of the information unit representing the collision,
and wherein transmitting means are provided, which are designed for contactless delivery
of the established first replacement information unit.
[0017] To solve the problem described above, in a communication device according to the
invention, a communication device circuit according to the invention is provided.
[0018] To solve the problem described above, in a data carrier circuit according to the
invention, features according to the invention are provided, so that a data carrier
circuit according to the invention can be characterized as follows:
Data carrier circuit for a data carrier, said data carrier being designed for contactless
communication with a communication device, and in which data carrier identification
information is stored which can be transmitted from the data carrier in a contactless
manner in the form of information units to the communication device, and second transmitting
means are provided, which are designed for delivery of an information unit in a contactless
manner, and checking means are provided which are designed for checking whether, after
delivery of the information unit, a first replacement information unit established
by the communication device can be received from the communication device, and the
second transmitting means are provided for continuing delivery of the identification
information with the information unit following the information unit previously transmitted
to the communication device, if it is established at the checking means that either
no established first replacement information unit is received from the communication
device or a first replacement information unit established by the communication device
is received and the received established first replacement information unit is identical
with the information unit previously transmitted to the communication device.
[0019] To solve the problem described above, with a data carrier according to the invention,
a data carrier circuit according to the invention is provided.
[0020] To solve the problem described above, a communication system according to the invention
is provided with a communication device according to the invention, which has a communication
device circuit according to the invention, and at least one data carrier according
to the invention, which has a data carrier circuit according to the invention.
[0021] By providing the measures according to the invention, the advantage is obtained that
a collision of different information units is managed by a prompt selection from a
first data carrier or a group of first data carriers, so that from the selected first
data carrier or from the group of selected first data carriers the next information
unit provided for delivery to the communication device can be transmitted practically
without time loss and becomes available for processing in the communication device
practically without notable delay despite the previously occurring detection of a
collision.
[0022] In a solution according to the invention, it has proved advantageous if in addition
the measures according to claim 2 or claim 6 or claim 10 or claim 15 are provided.
The resulting advantage is obtained that at least in a second data carrier or even
a group of second data carriers, whose information unit was involved in the collision,
suspension of delivery of information units of the respective identification information
is effected by means of the first replacement information unit established and delivered
in the communication device, without expensive two-way communication with the communication
device. Moreover, in the communication device the resulting advantage is obtained
that a time-consuming subsequent repeated reception of each information unit already
received collision-free is avoided, because each information unit already temporarily
stored is used for completing the identification information originating from one
of the second data carriers. As a result, moreover, in the data carrier the advantage
is obtained that delivery of the identification information can be continued at a
later time without repeating an information unit already transmitted at a precisely
defined position within the identification information.
[0023] In a solution according to the invention it has further proved advantageous if in
addition the measures according to claim 3 or claim 11 are provided. As a result,
the advantage is obtained that the information unit involved in the collision and
originating from at least one second data carrier is not lost, but is used immediately
for replacing the received information unit representing the collision, so that at
a later time only the information units of the second data carrier that have actually
not yet been transmitted still have to be received.
[0024] In a solution according to the invention it has further proved advantageous if in
addition the measures according to claim 4 or claim 7 or claim 12 or claim 16 are
provided. As a result, the advantage is obtained that a maximally efficient delivery
of information units of a second data carrier is ensured, said second data carrier
not having previously been selected by the first replacement information unit established
in the communication device and transmitted from it, and at a time defined by the
communication device and without the need for repeat transmission of the information
units from this second data carrier. As a result, moreover, the advantage is obtained
that each data carrier involved in the collision, i.e. both a first data carrier and
a second data carrier, only has to deliver all information units of the respective
identification information a single time.
[0025] It should be mentioned that the advantages described in connection with the receiving
method and the transmission method are also obtained in an anti-collision method according
to the invention according to claim 8, which comprises the receiving method according
to the invention and the transmission method according to the invention. The same
applies to a communication device according to the invention according to claim 13,
which has the communication device circuit according to the invention according to
one of the claims 9 to 12. The same applies moreover to a data carrier according to
the invention according to claim 17, which has the data carrier circuit according
to the invention according to one of the claims 14 to 16. The same applies moreover
to a communication system according to the invention according to claim 18, which
has the previously described communication device according to the invention and at
least one previously described data carrier according to the invention.
[0026] These and other aspects of the invention are apparent from and will be elucidated
with reference to the embodiment described hereunder.
[0027] The invention will be described in more detail in the following on the basis of an
embodiment represented in the drawings, but the invention is not limited to this.
Fig. 1 shows schematically, in the form of a block diagram, a communication system
according to the invention.
Fig. 2 shows, similarly to Fig. 1, a communication device according to the invention
of the communication system according to Fig. 1 in detail.
Fig. 3 shows, similarly to Fig. 1, a data carrier according to the invention of the
communication system according to Fig. 1 in detail.
Fig. 4 shows a flow diagram for a receiving method according to the invention.
Fig. 5 shows a flow diagram for a transmission method according to the invention.
[0028] Fig. 1 shows a communication system 1, which will be called system 1 hereinafter
and is designed according to standard ISO 14443 for contactless communication. System
1 has a communication device 2 shown in detail in Fig. 2 and a first data carrier
3 and a second data carrier 3', which are of identical structure. What is different
is that first identification information I1 is contained in the first data carrier
3 and second identification information 12, different from the first identification
information I1, is contained in the second data carrier 3'. The reference symbols
of all components of the second data carrier 3' are indicated by an apostrophe, when
they are referred to in the following description.
[0029] The communication device 2 is designed for contactless communication with each of
the two data carriers 3 and 3', after the respective data carrier 3 or 3' has transmitted
its identification information I1 or 12 to the communication device 2 without collision
with some other identification information and as a result of that and preferably
by means of the respective identification information I1 or I2, can respond in an
unambiguous manner. For this purpose, a carrier signal C can be generated and delivered
by means of the communication device 2. By means of carrier signal C, the data carriers
3 and 3' can be supplied with energy as soon as they are brought within a communication
zone of communication device 2. By means of the carrier signal, information can moreover
be exchanged between the data carriers 3 and/or 3' and the communication device 2,
and for the purpose of transmitting information from communication device 2 the carrier
signal C is subjected to amplitude modulation, and for the purpose of transmitting
information from one of the data carriers 3 and/or 3' the carrier signal C is subjected
to load modulation. For example, an inventory command IC 1 can be delivered from the
communication device 2, causing in data carriers 3 and 3' essentially simultaneous
transmission of the respective identification information I1 and 12 in the form of
information units IU and IU', which in the present case are given by bits coded according
to the Manchester code, as discussed in detail below.
[0030] The communication device 2, shown in detail in Fig. 2, has a communication device
circuit 4, which has a host-interface connection 5, by which it can be connected to
a so-called host computer, so that it can exchange information with the host computer,
though this is not discussed in more detail. The communication device 1 also has transmitting
means 6, comprising matching means 7 and a transmission coil configuration 8, it being
possible to produce inductive coupling with the data carriers 3 and/or 4 in a known
manner by means of the transmission coil configuration 8, and it being possible to
achieve matching between a circuit impedance and an impedance of the transmitting
means 6 in a known manner by means of the matching means 7.
[0031] The communication device circuit 4 also has a transmitting means connection 9, by
which the transmitting means 6 are connected to the communication device circuit 4.
[0032] The communication device circuit 4 also has a sequencing stage 10, which is provided
for controlling the information processing sequence in communication device circuit
4 and which in the present case is in the form of a so-called microcontroller, by
means of which information can be exchanged both with the host computer and with each
of the data carriers 3 and 3'.
[0033] The communication device circuit 4 also has first delivering means 11, which are
designed for delivering information via the transmitting means connection 9 to the
transmitting means 6 depending on a first control signal C1 or a second control signal
C2 that can be generated by means of the sequencing stage 10. In the present case
the information is formed by the inventory command IC1 or by a replacement information
unit (RIU1), further details of which are given below. The first delivering means
11 comprise inventory command generating means 12 and first encoding means 13 and
first modulating means 14 and first amplifying means 15. The inventory command generating
means 12 are designed for generating and delivering the inventory command IC 1 to
the encoding means 13 on receiving the first control signal C1, it being possible
for an inventory command CIC coded according to the Manchester code to be generated
and delivered by said encoding means 13. The modulating means 14 are designed for
receiving the coded inventory command CIC and, as a function thereof, for generating
and delivering the carrier signal C, which has modulated and unmodulated signal segments
depending on the coded inventory command CIC, to the amplifying means 15, from which
the carrier signal C can be delivered to the transmitting means 6, by means of which
it can be transferred from communication device 1 to the data carriers 3 and 3'.
[0034] The first delivering means 11 also have replacement information unit generating means
16 and second encoding means 17 and second modulating means 18. The replacement information
unit generating means 16 are designed so that, on receiving the second control signal
C2 from the sequencing stage 10, they generate and deliver the first replacement information
unit RIU1 to the second encoding means 17. The second encoding means 17 are designed
for encoding the first replacement information unit RIU1 according to the Manchester
code and for delivering the coded first replacement information unit CRI to the second
modulating means 18, in which, analogously to the first modulating means 14, the carrier
signal C can be modulated according to the coded replacement information unit CRI
and the carrier signal C is delivered to the amplifying means 15, so that the replacement
information unit RIU1 can also be transmitted to the data carriers 3 and 3' by means
of the transmitting means 6. Accordingly, the first delivering means 11 are designed
for contactless delivery of the first replacement information unit RIU1.
[0035] The communication device circuit 4 also has receiving means 20, which are designed
for contactless reception of an information unit RIU receivable from data carriers
3 and/or 3' by means of the load-modulated carrier signal C. For this purpose the
receiving means 19 have filtering means 20, which are connected to the transmitting
means connection 9. The receiving means 19 also have demodulating means 21 and amplifying-filtering
means 22 and decoding means 23 and information unit detecting means 24.
[0036] The filtering means 20 are designed for filtering the carrier signal C that arises
at the transmitting means connection 9. The first filtering means 20 are also designed
for delivering a receive signal RS representing the filtered carrier signal C to the
demodulating means 21, by means of which the receive signal RS can be demodulated
and can be delivered as a demodulated receive signal DRS to the amplifying-filtering
means 22. By means of the amplifying-filtering means 22, the demodulated receive signal
DRS can be amplified and filtered again, and can be delivered as a filtered and demodulated
receive signal DRS to the decoding means 23, which are designed for decoding the demodulated
receive signal DRS and for delivering a decoded receive signal DCRS. The decoded receive
signal DCRS can be supplied to the information unit detecting means 24, which are
designed for detecting and for delivering the information unit RIU represented by
the decoded receive signal DCRS to the sequencing stage 10.
[0037] The communication device circuit 4 also has collision detection means 25, to which
the decoded receive signal DCRS can be supplied from the decoding means 23. The collision
detection means 25 are designed for detecting that the received information unit RIU,
which is represented by the decoded receive signal DCRS, represents a collision of
two different information units IU and IU' arising essentially simultaneously, and
of these two different information units IU and IU', the one information unit IU originates
from the first data carrier 3 and the other information unit IU' originates from the
second data carrier 3'. The collision detection means 25 are designed for generating,
as a result of detecting said collision, a collision detection signal CDS and for
delivering the collision detection signal CDS to the sequencing stage 10.
[0038] The communication device circuit 4 also has replacing means 26, which are designed
for interacting with the collision detection means 25 and, for the case where a collision
of different information units IU and IU' is detected by the collision detection means
25, for replacing the received information unit RIU with the first replacement information
unit RIU1 established by the communication device 1, said first replacement information
unit RIU1 serving instead of the received information unit RIU representing the collision,
as the information unit IU that originates from the first data carrier 3. In the present
case it is established by definition, i.e. from or via the communication device 1,
that the first replacement information unit RIU1 represents the logic ONE value.
[0039] The sequencing stage 10 contained in the communication device circuit 4 also has
information unit storage means 27, which are designed for storing information units
IU and/or IU'. The information unit storage means 27 also have information unit temporary
storing means 28, which are designed for buffering each information unit IU received
at the communication device 1 prior to collision detection, as an information unit
IU' originating from the second data carrier 3'. It is envisaged, in sequencing stage
10, that a copy of the information units IU that were received prior to the occurrence
of a collision is created in the information unit buffer means 28 as the information
units IU' by means of the sequencing stage 10.
[0040] The replacing means 26 are also designed for again replacing the previously established
first replacement information unit RIU1 with a second replacement information unit
RIU2 that deviates from it and is used instead of the received information unit RIU,
representing the collision, as the information unit IU' which originates from the
second data carrier 3' and which caused the collision. By means of sequencing stage
10, this second replacement information unit RIU2 can be stored in the information
unit temporary storing means 28, that is, instead of the received information unit
RIU, which caused the collision.
[0041] The communication device circuit 4 also has continue command generating means, which
in the present case are constructed in the form of the inventory command generating
means 12. The sequencing stage 10 is also designed for monitoring whether all information
units IU of the first identification information I1 to be received from the first
data carrier 3 have been received. As soon as all information units IU of the first
identification information I1 have been received, the sequencing stage 10 is designed
for again generating and delivering the first control signal C1 to the inventory command
generating means 12. The inventory command generating means 12 are then designed for
generating a continue command, which is formed in the present case by the inventory
command IC1, and for delivering the continue command with the assistance of the delivering
means 11, said continue command having no effect in the first data carrier 3, and
effecting, in the second data carrier 3', continuation of delivery of the information
units IU' of the second identification information 12 with the information unit IU'
that comes after the information unit IU' that previously caused detection of the
collision. For the case where, as in the present example, only two data carriers 3
and 3' are provided within the communication zone of the communication device 1, the
information units IU' that come after the information unit IU' that caused the collision
are then delivered from the second data carrier 3' collision-free to the communication
device 1 and received with the communication device 1 by the receiving means 19 and
stored in the information unit buffer means 28 as the information units IU' that originate
from the second data carrier 3'.
[0042] It should be mentioned at this point that for the case where the established first
replacement information unit RIU1 represents the logic ZERO value, the data carriers
3 and 3' exchange roles and the second data carrier 3' is first to deliver its identification
information 12 completely to the communication device 1 and only after that, the first
data carrier 3 completes its identification information I1 beginning with the information
unit IU that occurs after the information unit IU that caused the collision.
[0043] It should further be mentioned at this point that for example when three data carriers
3, 3' and 3" are present, the case may arise where, in a first collision, the first
data carrier 3 is selected by means of the first replacement information unit RIU1
and sends its identification information I1 completely to the communication device
1 and then the remaining two data carriers 3' and 3" begin jointly to complete the
respective identification information I2 and I3. During this, a second collision may
occur, so that this group of two data carriers 3' and 3" breaks down again, and for
example the second data carrier 3' takes on the role of the first data carrier 3 and
the third data carrier 3" takes on the role of the second data carrier 3', because
the second data carrier 3' is selected on account of the first replacement information
unit RIU1 being received again. In this case, therefore, the second data carrier 3'
will send its identification information 12 completely to the communication device
2 first, and then the third data carrier 3" will complete its identification information
13 beginning with the information unit It" that comes after the information unit IU"
that caused the collision.
[0044] The data carrier 3 shown in Fig. 3 has a data carrier circuit 29, which has identification
information storing means 30. Data carrier 3 also has second transmitting means 31,
which are designed for interacting with the first transmitting means 6 of the communication
device 1. The data carrier circuit 29 has a transmitting means connection 32, by which
it is connected to the second transmitting means 31. The second transmitting means
31 have a transmitting coil configuration 33, which is designed and provided for inductive
coupling with the transmitting coil configuration 8 of the communication device 1.
In addition, within the data carrier circuit 29, a resonance capacitor 34, assigned
to the transmitting means 30, is provided, so that the second transmitting means 31
form a resonance circuit, by means of which the energy supply mentioned at the beginning
for communication device 1 and the aforementioned information exchange can be performed.
[0045] The data carrier circuit 29 also has supply voltage generating means 35, which by
utilizing the carrier signal C occurring at the transmitting means connection 32,
are designed for generating and delivering a supply voltage for the data carrier circuit
29 against a reference potential GND.
[0046] The data carrier circuit 29 also has clock generation means 36, which are also connected
to the transmitting means connection 32 and, by utilizing the signal occurring at
the transmitting means connection 32, are designed for generating and delivering a
clock signal CLK for the data carrier circuit 29. The clocking means 36 are designed
as clock-pulse regenerating means.
[0047] Data carrier circuit 29 also has second receiving means 37, which are designed for
receiving and detecting the inventory command IC 1 and the continue command. For this
purpose the receiving means 37 have second demodulating means 38 and second decoding
means 39 and inventory command detecting means 40. The second demodulating means 38
are connected to the transmitting means connection 32 and are designed for demodulating
the carrier signal C that can be read off there, and for delivering a demodulated
carrier signal DC to the second decoding means 39. The second decoding means 39 are
designed for decoding the demodulated carrier signal DC and for delivering the decoded
and demodulated carrier signal DDC to the inventory command detecting means 40. The
inventory command detecting means 40 are designed for detecting the inventory command
IC1 1 communicated to data carrier 3 by means of the carrier signal C and for delivering
this inventory command IC1 to a second sequencing stage 41. The second sequencing
stage 41 is designed and provided in the data carrier circuit 29 for controlling the
information processing sequence, such as the received inventory command IC 1 and the
continue command and subsequent delivery or interruption and subsequent continuation
of delivery of information units IU of the identification information I1.
[0048] Data carrier circuit 29 also has delivering means 42, which are constructed with
the aid of the sequencing stage 41 and with the aid of reply generating means 43 and
third encoding means 44 and third modulating means 45. The delivering means 42 are
designed, as a result of receiving the inventory command IC1 and with the aid of the
sequencing stage 41, for read-out of the identification information I1 in the form
of its information units IU from the identification information storage means 30 and
for delivering the information units IU as a component of a third control signal C3
to the reply generating means 43. The reply generating means 43 are designed, by utilizing
the third control signal C3, for generating and delivering reply information in response
to the inventory command IC1, said reply information having, as an essential component,
an information unit IU of the identification information I1. The third encoding means
44 are designed for encoding the reply information according to the Manchester code
and for delivering the coded reply information CIU to the third modulating means 45.
The third modulating means 45 are designed for load-modulation of the carrier signal
C occurring at the transmitting means connection 32 in relation to the coded reply
information CIU received.
[0049] Data carrier circuit 29 also has checking means 46, which are designed for checking
whether, after delivering the information unit IU, a first replacement information
unit RIU1 established by communication device 1 can be received by communication device
1. For this purpose, the checking means 46 have third demodulating means 47 and third
decoding means 48 and replacement information unit detecting means 49 and replacement
information unit evaluation means 50. The third demodulating means 47 are designed
for demodulating the carrier signal C occurring at the transmitting means connection
32 and for delivering the demodulated carrier signal DC to the third decoding means
48. The function of the third demodulating means 47 can also be fulfilled with the
second demodulating means 38, leading to a simpler circuit design. The third decoding
means 48 are designed for decoding the demodulated carrier signal DC and for delivering
a decoded and demodulated carrier signal DDC to the replacement information unit detecting
means 49 and the replacement information unit evaluation means 50. The replacement
information unit detecting means 49 are designed, by utilizing the decoded and demodulated
carrier signal DDC, for detecting whether the carrier signal C has the first replacement
information unit RIU1, after which a detection signal RI can be sent from the replacement
information unit detecting means 49 to the second sequencing stage 41. The replacement
information unit evaluation means 50 are designed for evaluating the decoded and demodulated
carrier signal DDC with respect to the information it contains, and in the present
case only the first replacement information unit RIU1 can be evaluated and sent to
the second sequencing stage 41. However, it should be mentioned at this point that
it is also possible for replacement information units that are different from one
another to be communicated to data carrier 3, then by means of the replacement information
unit evaluation means 50 it is also possible for different replacement information
units to be evaluated and sent to the second sequencing stage 41.
[0050] The delivering means are further designed for continuing the delivery of the identification
information I1 with the information unit IU that comes after the information unit
IU sent previously to the communication device 1, if it is established at the checking
means 46 that either no established first replacement information unit RIU1 was delivered
from communication device 2 and subsequently received, or a first replacement information
unit RIU1 established by communication device 1 is received and additionally the received
established first replacement information unit RIU1 is identical with the information
unit previously sent to communication device 1. The delivering means 42 are further
designed for interrupting the delivery of the identification information I1 if it
is established at the checking means 46 that the established first replacement information
unit RIU1 from communication device 1 is received and the received first replacement
information unit RIU1 is identical with the information unit IU previously sent to
the communication device.
[0051] The delivering means 42 also have position storing means 51 provided in the sequencing
stage 41, by means of which at least the position of the information unit IU coming
after the information unit IU sent prior to reception of the established first replacement
information unit RIU1 can be flagged. This occurs in the present case by storage of
a pointer to the information unit IU coming after the information unit IU that caused
the collision. The delivering means 42 are further designed for continuing the delivery
of the information units IU of the identification information I1 with the information
unit IU that corresponds to the marked position, when reception of the continue command
at the second receiving means 37 is detected.
[0052] The function of the communication device 2 according to Fig. 2 and the function of
the data carrier 3 according to Fig. 3 will now be discussed, on the basis of an embodiment
of system 1 according to Fig. 1. In accordance with this embodiment, it is to be assumed
that the identification information I1 of the first data carrier 3 has the binary
values "1001001" ("ONE ZERO ZERO ONE ZERO ZERO ONE") and the identification information
12 of the second data carrier 3' has the binary values "1000011" ("ONE ZERO ZERO ZERO
ZERO ONE ONE"). It should further be assumed that the two data carriers 3 and 3' are
located within the communication zone of communication device 2. Since identification
information I1 and identification information 12 are different from one another, at
first an anticollision process is started and processed in system 1, which is provided
for managing a collision of information units IU and IU', said information units IU
and IU' being sent by the respective data carrier 3 or 3' to communication device
2, and with a collision of this kind, which in this case is bit-by-bit, the information
unit RIU received at communication device 2 represents an essentially simultaneous
occurrence of the different information units IU and IU', and of these different information
units IU and IU', the one information unit IU originates from the first data carrier
3 and the other information unit IU' originates from the second data carrier 3' and
both information units IU and IU' are located at the fourth position of the respective
identification information I1 and 12 respectively, and cause the collision. The anti-collision
method comprises a receiving method and a method of delivery, to be described in detail
below.
[0053] The receiving method is provided for the contactless reception of identification
information I1 or 12 respectively, which is stored in data carrier 3 or 3' and can
be received from data carrier 3 or 3' in a contactless manner in the form of information
units IU or IU' at communication device 2, and is prepared by means of communication
device 2 or the communication device circuit 4. The method of delivery is provided
for the contactless delivery of identification information I1 or I2, said identification
information I1 or 12 being stored in data carrier 3 or 3' and being transmissible
in a contactless manner in the form of information units IU or IU' to communication
device 2, and is prepared by means of data carrier 3 or 3', i.e. essentially by means
of its data carrier circuit 4 or 4'.
[0054] According to the first flow chart 52 shown in Fig. 4, the receiving method is started
in a block 54 from communication device 2 by sending the inventory command IC1 by
means of the carrier signal C, with an information unit reception counter being set
to the value Zero (0).
[0055] According to the second flow diagram 53 shown in Fig. 5, the method of delivery is
started in block 55 by reception of the inventory command IC 1 simultaneously at data
carrier 3 and at data carrier 3'. Then, in block 56, delivery of the respective identification
information I1 and I2 is started with delivery of the respective first information
unit IU or IU, both of which have the binary value ONE in the present case, by each
of the data carriers 3 and 3' by means of the respective delivering means 42 and 42'.
In communication device 2, by means of the first receiving means 19, an information
unit RIU is received in block 57 in accordance with the receiving method and it is
checked in block 58 whether a collision of two different information units IU and
IU' occurring essentially simultaneously is represented by the received information
unit RIU. As this is not established in communication device 2 by means of the collision
detection means 25, the receiving method is continued in a block 59, in which it is
decided whether the received information unit RIU represents the binary value ONE
or the binary value ZERO.
[0056] For the case where the received information unit RIU represents the binary value
ZERO, the receiving method is continued in a block 60, in which, by means of the information
unit detecting means 24, the first information unit IU of the identification information
I1 is stored in the information unit storage means 27. For the case where the checking
in block 59 shows that the received information unit RIU represents the binary value
ONE, the receiving method is continued in block 61, in which, by means of the information
unit detecting means 24, a bit with the binary value ONE is stored as the first information
unit IU of the identification information I1 in the information unit storage means
27, which applies in the present case.
[0057] Then the receiving method is continued in block 62, in which the information unit
reception counter is increased by the value One (1).
[0058] After that, the receiving method is continued in a block 63, in which it is checked
whether the information unit counter has reached a maximum value, in the present case
the value Seven (7). For the case where the information unit counter has reached the
value Seven (7), the receiving method is terminated in block 64, as in this case all
information units IU of the first identification information I1 have already arrived
at the communication device 2. For the case where the information unit counter has
not reached the value Seven (7), the receiving method is continued in block 57.
[0059] In the method of delivery, in a block 65, after delivery of the first information
unit IU or IU', it is checked at data carriers 3 or 3', by means of the respective
checking means 46 and 46', whether a first replacement information unit RIU1 established
by communication device 2 can be received from communication device 2 after delivery
of the respective information unit IU and IU'.
[0060] As this is not so in the present case, the method of delivery is continued in a block
66, in which a pointer to the next information unit to be delivered is established
in the respective position storage means 51 and 51' by means of the sequencing stage
41 or 41'.
[0061] Then the method of delivery is continued in a block 67, in which it is checked whether
the flagged pointer is less than or equal to a pointer limit, which represents the
last information unit IU or IU' of the respective identification information I1 or
12 to be delivered. For the case where the flagged pointer has not yet exceeded the
pointer limit, the method of delivery is continued in block 56 by delivering the second
information unit IU or IU', which in the present case is given in each case by the
binary value ZERO. Since identical binary values are provided both at the second position
and at the third position of identification information I1 and of identification information
12, the previously described receiving method and the method of delivery are processed
as described above. The three information units "100" received collision-free are
stored as belonging to the identification information I1 in communication device 2
with the information unit storage means 27, because at this stage the existence of
the second data carrier 3' is not yet known.
[0062] After that, in the method of delivery, the fourth information unit IU or IU' of the
respective identification information I1 or I2 is delivered by the respective data
carrier 3 or 3'. In accordance with the method of delivery, in block 56 an information
unit IU representing the binary ONE value, is delivered by the first data carrier
3. Simultaneously, an information unit IU' representing the binary ZERO value, is
delivered from the second data carrier 3'. In accordance with the receiving method,
in block 57, in communication device 2, an information unit RIU is received, which
information unit RIU represents a mixed state consisting of a binary ONE and a binary
ZERO on the basis of the encoding in the Manchester code. It should be mentioned at
this point that an auxiliary carrier can also be provided, which for its part can
be coded according to the Manchester code. Furthermore, other codes can also be employed,
such as the so-called FM0 Code, which is used for example in the UHF range, or the
F2F Code.
[0063] Then it is detected in block 58 that the received information unit RIU represents
a collision of the two different information units IU and IU' occurring essentially
simultaneously, and of which two different information units IU and IU' the one information
unit IU originates from the first data carrier 3 and the other information unit IU'
originates from the second data carrier 3'. Next, the receiving method is continued
in a block 68, in which the received information unit RIU is replaced, by means of
the replacing means 26, with the first replacement information unit RIU1 established
by communication device 2, in the present case representing the binary value ONE,
which is used instead of the information unit RIU representing the collision, as the
information unit IU that originates from the first data carrier 3. The first replacement
information unit RIU1 established in this way is stored, by means of the information
unit storage means 27, at the fourth position of the first identification information
I1 that is to be received. At the same time, in accordance with the receiving method,
the first replacement information unit RIU1 is delivered to the data carriers 3 or
3' in a contactless manner.
[0064] At the first data carrier 3, in accordance with the method of delivery, it is checked
and established in block 65 that the first replacement information unit RIU1 is received,
because the structure of the carrier signal C has an amplitude modulation caused by
the communication device 2.
[0065] Then the method of delivery is continued at data carrier 3 with block 69, in which
it is checked whether the received first replacement information unit RIU1 represents
the binary value ZERO. As this is not so in the present case, at the first data carrier
3 the method of delivery is continued in block 60, whereby it was decided that delivery
of the first identification information I1 should continue with the information unit
IU coming after the information unit IU sent previously to the communication device
2 - i.e. with the fifth information unit - because the first replacement information
unit RIU1 established by communication device 2 is received and the received established
first replacement information unit RIU1 is identical with the information unit IU,
representing the binary ONE value, sent previously to communication device 2. Accordingly,
the method of delivery is continued in block 66.
[0066] Similarly, at data carrier 3' or in the method of delivery taking place there, it
is also established in block 65 that after delivery of the fourth information unit
IU', the first replacement information unit RIU1 established by communication device
2 can be received from communication device 2. In accordance with the method of delivery,
it is established in block 69 that the received first replacement information unit
RIU1 is not identical with the fourth information unit IU', representing the binary
value ZERO, sent previously to communication device 2, and it is branched to block
70, in which delivery of the identification information 12 is interrupted. At the
same time, in the method of delivery, in a block 70 the position of the fifth information
unit IU' coming after the fourth information unit IU' delivered prior to reception
of the first replacement information unit RIU1 is flagged by means of the pointer.
[0067] Simultaneously with this, in essence in the receiving method it happens that in block
68 each information unit RIU received at communication device 2 prior to collision
detection is buffered by the information unit storage means 27, as the information
unit IU' originating from the second data carrier 3'. This takes place by creation
of a copy of the information units IU received at communication device 2 prior to
collision detection, which were stored in the information unit storage means 27 as
belonging to the first information unit I1. Furthermore, in block 68 the previously
established first replacement information unit RIU1 is replaced by a second replacement
information unit RIU2 that differs from it- in the present case is complementary to
it - representing in the present case the binary ZERO value, and instead of the information
unit representing the collision, is used and stored in the fourth position of the
information unit 12 receivable from data carrier 3', as the information unit RIU that
originates from the second data carrier 3'.
[0068] Starting from this point of time, the second data carrier 3' has already interrupted
delivery of its identification information I2 and only the first data carrier 3 is
still sending its identification information I1 and the information units IU contained
in the identification information I1 and still outstanding to the communication device
2, therefore in communication device 2 the receiving method is processed omitting
block 68, since the information units IU received at communication device 2 are received
collision-free. Then the method of delivery comes to an end at a block 71.
[0069] After the first identification information I1 has been received completely at communication
device 2 and the receiving method for the identification information I1 has ended
at block 64, the receiving method is started again at block 54 by delivery of the
continue command. As a result, at the second data carrier 3', continuation of delivery
of the information units IU' of the second identification information 12 is triggered
with the fifth information unit IU' that comes after the fourth information unit IU',
which previously caused collision detection. At the second data carrier 3', the method
of delivery is then started again at block 55, subject to the proviso that after the
continue command is received by communication device 2, delivery of the information
units IU' of the second identification information 12 continues with the information
unit IU' that corresponds to the flagged position, namely the fifth position. Because
the first data carrier 3 no longer delivers any information units at this point of
time, the method of delivery will be processed for the remaining three information
units IU' omitting blocks 69 and 70.
[0070] By providing the measures according to the invention, an anti-collision method that
is as efficient as possible is created, in which neither of the data carriers 3 or
3' has to repeat the delivery of the information units IU and IU' originating from
it.
[0071] It should be mentioned at this point that instead of the transmission coil configurations
8 and 33, it is also possible to provide antenna configurations or transmission configurations
operating capacitively.
[0072] It should further be mentioned that the continue command can also be effected by
a separate command that is different from the inventory command IC1 and that the communication
device circuit 4 can be designed for generating this separate command IC2 and the
data carrier circuit 29 can be designed for processing it.
[0073] It should be mentioned that the clock signal CLK can also be generated by an internal
oscillator.
[0074] It should further be mentioned that the measures according to the invention can also
be used in a so-called full-duplex communication system, in which communication between
the communication device 2 and the data carrier 3 takes place via communication channels
that can be separated from each other.
1. A receiving method for the contactless reception of identification information (I1,
I2), which identification information (I1, I2) is stored in a data carrier (3, 3')
which can be transferred from the data carrier (3, 3') in a contactless manner in
the form of information units (IU, IU') to a communication device (2) and can be received
with the communication device (2), said receiving method having the steps presented
below, namely reception of an information unit (RIU) and detection that the received
information unit (RIU) represents a collision of two different information units (IU,
IU') occurring simultaneously, and of which two different information units (IU, IU')
the first information unit (IU) originates from a first data carrier (3) and the second
information unit (IU') originates from a second data carrier (3'), and replacing the
received information unit (RIU) with a first replacement information unit (RIU1),
wherein the first replacement information (RIU1) is established by the communication
device (2) for serving as the information unit (IU) that originates from the first
data carrier (3), which replacement information unit (RIU) is used instead of the
information unit (RIU) representing the collision, and delivery of the first replacement
information unit (RIU1) to the first and the second data carrier in a contactless
manner.
2. A receiving method according to claim 1, wherein additionally each information unit
(RIU) received at communication device (2) prior to collision detection is buffered
as the information unit (IU') that originates from the second data carrier (3').
3. A receiving method according to claim 2, wherein the previously established first
replacement information unit (RIU1) is replaced with a second replacement information
unit (RIU2) differing from it, which second replacement unit (RIU2) is used instead
of the information unit (RIU) representing the collision, as the information unit
(IU') that originates from the second data carrier (3').
4. A receiving method according to claim 3, wherein, following complete presence of all
information units (IU) that originate from the first data carrier (3), a continue
command is generated and is delivered in a contactless manner, by means of which delivery
of the information units (IU') of the identification information (I2) continues at
the second data carrier (3') with the information unit (IU') coming after the information
unit (IU') that previously caused collision detection.
5. A method of delivery for the contactless delivery of identification information (I1,
I2), which identification information (I1, I2) is stored in a data carrier (3, 3')
and can be transmitted in a contactless manner in the form of information units (IU,
IU') from the data carrier (3, 3') to a communication device (2), said method of delivery
having the steps listed below, namely delivery of an information unit (IU, IU') and
checking whether, after delivery of the information unit (IU, IU'), a first replacement
information unit (RIU1) can be received from the communication device (2), wherein
the first replacement information unit (RIU1) is established by the communication
device (2) for serving as the information unit (IU) that originates from a first data
carrier, and continuation of delivery of the identification information (I1, I2) with
the information unit (IU, IU') following the information unit (IU, IU') previously
transmitted to the communication device (2), if either no established first replacement
information unit (RIU1) is received from the communication device (2) or a first replacement
information unit (RIU1) established by the communication device (2) is received and
the received established first replacement information unit (RIU 1) is identical with
the information unit (IU, IU') previously transmitted to the communication device
(2).
6. A method of delivery according to claim 5, wherein the delivery of the identification
information (I1, I2) is interrupted if the established first replacement information
unit (RIU1) is received from the communication device (2) and it is established that
the received first replacement information unit (RIU1) is not identical with the information
unit <(IU, IU') previously sent to the communication device (2) and wherein at least
the position of the information unit (IU, IU') following the information unit (IU,
IU') sent prior to reception of the first replacement information unit (RIU1) is memorized.
7. A method of delivery according to claim 6, wherein, after reception of a continue
command from the communication device, delivery of the information units (IU, IU')
of the identification information (I1, I2) continues with the information unit (IU,
IU') that corresponds to the memorized position.
8. An anti-collision method for managing a collision of information units (IU, IU'),
said information units (IU, IU') being sent in each case from one data carrier (3,
3') to a communication device (2) and in which collision the information unit (RIU1)
received at the communication device (2) represents a simultaneous occurrence of the
different information units (IU, IU'), and of which different information units (IU,
IU') the one information unit (IU) originates from a first data carrier (3) and the
other information unit (IU') originates from a second data carrier (3'), wherein the
anti-collision method comprises a receiving method according to one of the claims
1 to 4 and a method of delivery according to one of the claims 5 to 7.
9. A communication device circuit (4) for a communication device (2), said communication
device (2) being designed for contactless communication with a data carrier (3, 3'),
in which data carrier (3, 3') identification information (I1, I2) is stored, which
can be received from the data carrier (3, 3') in a contactless manner in the form
of information units (IU, IU'), wherein first receiving means (19) are provided, which
are designed for the contactless reception of an information unit (RIU), and wherein
collision detection means (25) are provided, which are designed for detecting that
the received information unit (RIU) represents a collision of two different information
units (IU, IU') occurring simultaneously, and of which two different information units
(IU, IU') the one information unit (IU) originates from a first data carrier (3) and
the other information unit (IU') originates from a second data carrier (3'), and wherein
replacing means (26) are provided, which are designed for replacing the received information
unit (RIU) with a first replacement information unit (RIU 1), wherein the first replacement
information unit (RIU1) is established by the communication device (2) for serving
as the information unit (IU) that originates from the first data carrier (3), said
first replacement information unit (RIU1) being used instead of the information unit
(RIU) representing the collision and serving as the information unit (IU) that originates
from the first data carrier (3), and wherein delivering means (11) are provided, which
are designed for the contactless delivery of the established first replacement information
unit (RIU1) to the first and the second data carrier.
10. A communication device circuit (4) according to claim 9, wherein information unit
buffer means (28) are provided, which are designed for buffering each information
unit (RIU) receivable at the communication device (2) prior to collision detection,
as an information unit (IU') originating from the second data carrier (3').
11. A communication device circuit (4) according to claim 10, wherein the replacing means
(26) are designed for the repeat replacement of the previously established first replacement
information unit (RIU1) with a second replacement information unit (RIU2) differing
from it, which second replacement information unit (RIU2) is used instead of the information
unit (RIU) representing the collision, as the information unit (IU') that originates
from the second data carrier (3').
12. A communication device circuit (4) according to claim 11, wherein continue command
generating means (12) are provided, which are designed for generating a continue command,
said continue command being deliverable with the assistance of the first delivering
means (11), and said continue command effecting continuation of delivery of the information
units (IU') of the identification information (12) at the second data carrier (3')
with the information unit (IU') that comes after the information unit (IU'), which
previously caused the collision detection.
13. A communication device (2) with a communication device circuit (4) according to one
of the claims 9 to 12.
14. A circuit (29,29') for a data carrier (3,3'), said data carrier (3, 3') being designed
for contactless communication with a communication device (2) in which data carrier
(3, 3') identification information (I1, I2) is stored, which can be transferred from
the data carrier (3, 3') in a contactless manner in the form of information units
(IU, IU') to the communication device (2), wherein second delivering means (42, 42')
are provided, which second delivering means (42, 42') are designed for the delivery
of an information unit (IU, IU') in a contactless manner, and wherein checking means
(46, 46') are provided, which checking means (46, 46') are designed for checking whether
a first replacement information unit (RIU1) can be received from the communication
device (2), wherein the first replacement information unit (RIU1) is established by
the communication device (2) after delivery of the information unit (IU, IU') for
serving as the information unit (IU) that originates from a first data carrier, and
wherein the second delivering means (42,42') are designed for continuing the delivery
of the identification information (I1, I2) with the information unit (IU, IU') that
comes after the information unit (IU, IU') previously sent to the communication device
(2), if it is established in the checking means (46,46') that either no established
first replacement information unit (RIU1) is received from the communication device
(2) or a first replacement information unit (RIU1) established by the communication
device (2) is received and the received established first replacement information
unit (RIU1) is identical with the information unit (IU, IU') previously sent to the
communication device (2).
15. A circuit (29, 29') according to claim 14, wherein the second delivering means (42,
42') are designed for interrupting the delivery of the identification information
(I1, 12) if it is established in the checking means (46, 46') that the established
first replacement information unit (RIU1) received from the communication device (2)
is not identical with the information unit (IU, IU') previously sent to the communication
device (2), and wherein the second delivering means (42,42') have position storing
means (51, 51'), by which at least the position of the information unit (IU, IU')
coming after the information unit (IU, IU') delivered prior to reception of the established
first replacement information unit (RIU1) call be memorized.
16. A circuit (29,29') according to claim 15, wherein second receiving means (37, 37')
are designed for receiving and detecting a continue command, which continue command
can be received in a contactless manner from the communication device (2), and wherein
the second delivering means (42, 42') are designed for continuing the delivery of
the information units (IU, IU') of the identification information (I1, I2) with the
information unit (IU, IU') that corresponds to the flagged position, if reception
of the continue command is detected at the receiving means (37, 37').
17. A data carrier (3, 3') with a circuit (29, 29') according to any one of the claims
14 to 16.
18. A communication system (1) for contactless communication, wherein a communication
device (2), which has a communication device circuit (4) according to one of the claims
9 to 11, is provided and wherein at least one data carrier (3, 3'), which has a circuit
(29, 29') according to any one of the claims 14 to 16, is provided.
1. Empfangsverfahren zum berührungslosen Empfangen von Identifikationsinformationen (11,
12), wobei die Identifikationsinformationen (11, 12) in einem Datenträger (3, 3')
gespeichert sind und von dem Datenträger (3, 3') auf eine berührungslose Weise in
Form von Informationseinheiten (IU, IU') zu einer Kommunikationsvorrichtung (2) übertragen
und von der Kommunikationsvorrichtung (2) empfangen werden können, wobei das Empfangsverfahren
die Schritte umfasst, die nachfolgend angegeben sind, nämlich Empfangen einer Informationseinheit
(RIU) und Detektieren, dass die empfangene Informationseinheit (RIU) eine Kollision
von zwei unterschiedlichen Informationseinheiten (IU, IU'), die gleichzeitig auftreten,
darstellt, und wobei von den zwei unterschiedlichen Informationseinheiten (IU, IU')
die erste Informationseinheit (IU) von einem ersten Datenträger (3) ausgeht und die
zweite Informationseinheit (IU') von einem zweiten Datenträger (3') ausgeht, und Ersetzen
der empfangenen Informationseinheit (RIU) durch eine erste Ersatzinformationseinheit
(RIU1), wobei die erste Ersatzinformationseinheit (RIU1) durch die Kommunikationsvorrichtung
(2) erzeugt wird, um als die Informationseinheit (IU) zu dienen, die von dem ersten
Datenträger (3) ausgeht, wobei die Ersatzinformationseinheit (RIU) anstatt der Informationseinheit
(RIU) verwendet wird, die die Kollision darstellt, und Übergeben der ersten Ersatzinformationseinheit
(RIU1) zum ersten und zweiten Datenträger auf eine berührungslose Weise.
2. Empfangsverfahren nach Anspruch 1, wobei zusätzlich jede Informationseinheit (RIU),
die bei der Kommunikationsvorrichtung (2) vor dem Detektieren einer Kollision empfangen
wird, als die Informationseinheit (IU'), die von dem zweiten Datenträger (3') ausgeht,
gepuffert wird.
3. Empfangsverfahren nach Anspruch 2, wobei die vorher erzeugte erste Ersatzinformationseinheit
(RIU1) durch eine zweite Ersatzinformationseinheit (RIU2), die von ihr verschieden
ist, ersetzt wird, wobei die zweite Ersatzeinheit (RIU2) anstatt der Informationseinheit
(RIU), die die Kollision darstellt, als die Informationseinheit (IU'), die von dem
zweiten Datenträger (3') ausgeht, verwendet wird.
4. Empfangsverfahren nach Anspruch 3, wobei dem vollständigen Vorhandensein aller Informationseinheiten
(IU), die von dem ersten Datenträger (3) ausgehen, folgend ein Fortsetzungsbefehl
erzeugt und auf eine berührungslose Weise übergeben wird, mit dessen Hilfe die Übergabe
der Informationseinheiten (IU') der Identifikationsinformationen (12) am zweiten Datenträger
(3') mit der Informationseinheit (IU') fortgesetzt wird, die auf jene Informationseinheit
(IU') folgt, die vorher das Detektieren der Kollision verursacht hat.
5. Übergabeverfahren zur berührungslosen Übergabe von Identifikationsinformationen (I1,
12), wobei die Identifikationsinformationen (I1, 12) in einem Datenträger (3, 3')
gespeichert sind und von dem Datenträger (3, 3') auf eine berührungslose Weise in
Form von Informationseinheiten (IU, IU') zu einer Kommunikationsvorrichtung (2) übertragen
werden können, wobei das Übergabeverfahren die Schritte umfasst, die nachfolgend aufgelistet
sind, nämlich Übergeben einer Informationseinheit (IU, IU') und Überprüfen, ob nach
der Übergabe der Informationseinheit (IU, IU') eine erste Ersatzinformationseinheit
(RIU1) von der Kommunikationsvorrichtung (2) empfangen werden kann, wobei die erste
Ersatzinformationseinheit (RIU1) durch die Kommunikationsvorrichtung (2) erzeugt wird,
um als die Informationseinheit (IU) zu dienen, die von einem ersten Datenträger ausgeht,
und Fortsetzen der Übergabe der Identifikationsinformationen (I1, 12) mit der Informationseinheit
(IU IU'), die der Informationseinheit (IU, IU') folgen, die vorher zur Kommunikationsvorrichtung
(2) übertragen wurden, wenn entweder keine erzeugte erste Ersatzinformationseinheit
(RIU1) von der Kommunikationsvorrichtung (2) empfangen wird oder eine erste Ersatzinformationseinheit
(RIU1), die von der Kommunikationsvorrichtung (2) erzeugt wurde, empfangen wird und
die empfangene erzeugte erste Ersatzinformationseinheit (RIU1) gleich der Informationseinheit
(IU, IU') ist, die vorher zur Kommunikationsvorrichtung (2) gesendet wurde.
6. Übergabeverfahren nach Anspruch 5, wobei die Übergabe der Identifikationsinformationen
(I1, 12) unterbrochen wird, wenn die erzeugte erste Ersatzinformationseinheit (RIU1)
von der Kommunikationsvorrichtung (2) empfangen wird und wenn festgestellt wird, dass
die empfangene erste Ersatzinformationseinheit (RIU1) nicht gleich der Informationseinheit
(IU, IU') ist, die vorher zur Kommunikationsvorrichtung (2) gesendet wurde, und wobei
wenigstens die Position der Informationseinheit (IU, IU'), die der Informationseinheit
(IU, IU') folgt, die vor dem Empfangen der ersten Ersatzinformationseinheit (RIU1)
gesendet wurde, gespeichert wird.
7. Übergabeverfahren nach Anspruch 6, wobei nach dem Empfangen eines Fortsetzungsbefehls
von der Kommunikationsvorrichtung die Übergabe der Informationseinheiten (IU, IU')
der Identifikationsinformationen (I1, I2) mit der Informationseinheit (IU, IU') fortgesetzt
wird, die der gespeicherten Position entspricht.
8. Anti-Kollisionsverfahren für das Management einer Kollision von Informationseinheiten
(IU, IU'), wobei die Informationseinheiten (IU, IU') in jedem Fall von einem Datenträger
(3, 3') zu einer Kommunikationsvorrichtung (2) gesendet werden und wobei bei der Kollision
die Informationseinheit (RIU1), die an der Kommunikationsvorrichtung (2) empfangen
wird, ein gleichzeitiges Auftreten der unterschiedlichen Informationseinheiten (IU,
IU') darstellt, und wobei von den unterschiedlichen Informationseinheiten (IU, IU')
die eine Informationseinheit (IU) von einem ersten Datenträger (3) ausgeht und die
andere Informationseinheit (IU') von einem zweiten Datenträger (3') ausgeht, wobei
das Anti-Kollisionsverfahren ein Empfangsverfahren nach einem der Ansprüche 1 bis
4 und ein Übergabeverfahren nach einem der Ansprüche 5 bis 7 umfasst.
9. Kommunikationsvorrichtungsschaltung (4) für eine Kommunikationsvorrichtung (2), wobei
die Kommunikationsvorrichtung (2) für berührungslose Kommunikation mit einem Datenträger
(3, 3') konstruiert ist, wobei in dem Datenträger (3, 3') Identifikationsinformationen
(I1, 12) gespeichert sind, die von dem Datenträger (3, 3') auf eine berührungslose
Weise in Form von Informationseinheiten (IU, IU') empfangen werden können, wobei erste
Empfangsmittel (19) vorgesehen sind, die zum berührungslosen Empfangen einer Informationseinheit
(RIU) konstruiert sind, und wobei Kollisionsdetektionsmittel (25) vorgesehen sind,
die zum Detektieren, dass die empfangene Informationseinheit (RIU) eine Kollision
von zwei unterschiedlichen Informationseinheiten (IU, IU') darstellt, die gleichzeitig
auftreten, konstruiert sind, und wobei von den zwei unterschiedlichen Informationseinheiten
(IU, IU') die eine Informationseinheit (IU) von einem ersten Datenträger (3) ausgeht
und die andere Informationseinheit (IU') von einem zweiten Datenträger (3') ausgeht,
und wobei Ersetzungsmittel (26) vorgesehen sind, die zum Ersetzen der empfangenen
Informationseinheit (RIU) durch eine erste Ersatzinformationseinheit (RIU1) konstruiert
sind, wobei die erste Ersatzinformationseinheit (RIU1) durch die Kommunikationsvorrichtung
(2) erzeugt wird, um als Informationseinheit (IU) zu dienen, die von dem ersten Datenträger
(3) ausgeht, wobei die erste Ersatzinformationseinheit (RIU1) anstatt der Informationseinheit
(RIU), die die Kollision darstellt und als die Informationseinheit (IU) dient, die
von dem ersten Datenträger (3) ausgeht, verwendet wird und wobei Übergabemittel (11)
vorgesehen sind, die zur berührungslosen Übergabe der erzeugten ersten Ersatzinformationseinheit
(RIU1) zum ersten und zweiten Datenträger konstruiert sind.
10. Kommunikationsvorrichtungsschaltung (4) nach Anspruch 9, wobei Informationseinheitspuffermittel
(28) vorgesehen sind, die konstruiert sind, um jede Informationseinheit (RIU), die
an der Kommunikationsvorrichtung (2) empfangen werden kann, vor dem Detektieren einer
Kollision als eine Informationseinheit (IU') zu puffern, die von dem zweiten Datenträger
(3') ausgeht.
11. Kommunikationsvorrichtungsschaltung (4) nach Anspruch 10, wobei die Ersetzungsmittel
(26) zum wiederholten Ersetzen der vorher erzeugten ersten Ersatzinformationseinheit
(RIU1) durch eine zweite Ersatzinformationseinheit (RIU2), die sich von ihr unterscheidet,
konstruiert sind, wobei die zweite Ersatzinformationseinheit (RIU2) anstatt der Informationseinheit
(RIU), die die Kollision darstellt, als die Informationseinheit (IU'), die von dem
zweiten Datenträger (3') ausgeht, verwendet wird.
12. Kommunikationsvorrichtungsschaltung (4) nach Anspruch 11, wobei Fortsetzungsbefehlerzeugungsmittel
(12) vorgesehen sind, die konstruiert sind, um einen Fortsetzungsbefehl zu erzeugen,
wobei der Fortsetzungsbefehl mit Unterstützung der ersten Übergabemittel (11) übergeben
werden kann, und wobei der Fortsetzungsbefehl die Fortsetzung der Übergabe der Informationseinheiten
(IU') der Identifikationsinformationen (12) am zweiten Datenträger (3') mit der Informationseinheit
(IU'), die nach der Informationseinheit (IU') kommt, die vorher das Detektieren der
Kollision verursacht hat, bewirkt.
13. Kommunikationsvorrichtung (2) mit einer Kommunikationsvorrichtungsschaltung (4) nach
einem der Ansprüche 9 bis 12.
14. Schaltung (29, 29') für einen Datenträger (3, 3'), wobei der Datenträger (3, 3') für
berührungslose Kommunikation mit einer Kommunikationsvorrichtung (2) konstruiert ist,
wobei in dem Datenträger (3, 3') Identifikationsinformationen (I1, 12) gespeichert
sind, die von dem Datenträger (3, 3') auf berührungslose Weise in der Form von Informationseinheiten
(IU, IU') zur Kommunikationsvorrichtung (2) übertragen werden können, wobei zweite
Übergabemittel (42, 42') vorgesehen sind, wobei die zweiten Übergabemittel (42, 42')
zum Übergeben einer Informationseinheit (IU, IU') auf eine berührungslose Weise konstruiert
sind, und wobei Überprüfungsmittel (46, 46') vorgesehen sind, wobei die Überprüfungsmittel
(46, 46') zum Überprüfen konstruiert sind, ob eine erste Ersatzinformationseinheit
(RIU1) von der Kommunikationsvorrichtung (2) empfangen werden kann, wobei die erste
Ersatzinformationseinheit (RIU1) von der Kommunikationsvorrichtung (2) nach dem Übergeben
der Informationseinheit (IU, IU') erzeugt wird, um als die Informationseinheit (IU)
zu dienen, die von einem ersten Datenträger ausgeht, und wobei die zweiten Übergabemittel
(42, 42') konstruiert sind zum Fortsetzen der Übergabe der Identifikationsinformationen
(I1, 12) mit der Informationseinheit (IU, IU'), die auf jene Informationseinheit (IU,
IU') folgt, die vorher zu der Kommunikationsvorrichtung (2) gesendet wurde, wenn in
den Überprüfungsmitteln (46, 46') erkannt wird, dass entweder keine erzeugte erste
Ersatzinformationseinheit (RIU1) von der Kommunikationsvorrichtung (2) empfangen wird
oder dass eine erste Ersatzinformationseinheit (RIU1), die von der Kommunikationsvorrichtung
(2) erzeugt wurde, empfangen wird und die empfangene erste Ersatzinformationseinheit
(RIU1) gleich der Informationseinheit (IU, IU') ist, die vorher zu der Kommunikationsvorrichtung
(2) gesendet wurde.
15. Schaltung (29, 29') nach Anspruch 14, wobei die zweiten Übergabemittel (42, 42') zum
Unterbrechen der Übergabe der Identifikationsinformationen (I1, 12) konstruiert sind,
wenn in den Überprüfungsmitteln (46, 46') erkannt wird, dass die erzeugte erste Ersatzinformationseinheit
(RIU1), die von der Kommunikationsvorrichtung (2) empfangen wird, nicht gleich der
Informationseinheit (IU, IU') ist, die vorher zur Kommunikationsvorrichtung (2) gesendet
wurde, und wobei die zweiten Übergabemittel (42, 42') Positionsspeicherungsmittel
(51, 51') aufweisen, durch die wenigstens die Position der Informationseinheit (IU,
IU'), die nach der Informationseinheit (IU, IU') kommt, die vor dem Empfang der erzeugten
ersten Ersatzinformationseinheit (RIU1) übergeben wurde, gespeichert werden kann.
16. Schaltung (29, 29') nach Anspruch 15, wobei zweite Empfangsmittel (37, 37') zum Empfangen
und Detektieren eines Fortsetzungsbefehls konstruiert sind, wobei der Fortsetzungsbefehl
auf eine berührungslose Weise von der Kommunikationsvorrichtung (2) empfangen werden
kann, und wobei die zweiten Übergabemittel (42, 42') zum Fortsetzen der Übergabe der
Informationseinheiten (IU, IU') der Identifikationsinformationen (I1, 12) mit der
Informationseinheit (IU, IU'), die der bezeichneten Position entspricht, wenn der
Empfang des Fortsetzungsbefehls an den Empfangsmitteln (37, 37') detektiert wird,
konstruiert sind.
17. Datenträger (3, 3') mit einer Schaltung (29, 29') nach einem der Ansprüche 14 bis
16.
18. Kommunikationssystem (1) zur berührungslosen Kommunikation, wobei eine Kommunikationsvorrichtung
(2), die eine Kommunikationsvorrichtungsschaltung (4) nach einem der Ansprüche 9 bis
11 aufweist, vorgesehen ist und wobei wenigstens ein Datenträger (3, 3'), der eine
Schaltung (29, 29') nach einem der Ansprüche 14 bis 16 aufweist, vorgesehen ist.
1. Procédé de réception destiné à la réception sans contact d'informations d'identification
(I1, 12), les informations d'identification (I1, 12) étant mémorisées dans un support
de données (3, 3'), pouvant être transférées sans contact à partir du support de données
(3, 3') sous la forme d'unités d'informations (IU, IU') vers un appareil de communication
(2) et pouvant être reçues avec l'appareil de communication (2), ledit procédé de
réception comportant les étapes décrites ci-dessous, à savoir la réception d'une unité
d'informations (RIU) et le fait de détecter que l'unité d'informations reçue (RIU)
représente la collision de deux unités d'informations différentes (IU, IU') apparaissant
simultanément et où, parmi les deux unités d'informations différentes (IU, IU') la
première unité d'informations (IU) provient d'un premier support de données (3) et
la seconde unité d'informations (IU') provient d'un second support de données (3'),
et remplaçant l'unité d'informations reçue (RIU) par une première unité d'informations
de remplacement (RIU1), les premières informations de remplacement (RIU1) étant établies
par l'appareil de communication (2) pour servir d'unité d'informations (IU) qui provient
du premier support de données (3), l'unité d'informations de remplacement (RIU) étant
utilisée à la place de l'unité d'informations (RIU) représentant la collision, ainsi
que l'acheminement de la première unité d'informations de remplacement (RIU1) aux
premier et second supports de données.
2. Procédé de réception selon la revendication 1, dans lequel, de plus, chaque unité
d'informations (RIU) reçue au niveau de l'appareil de communication (2), avant une
détection de collision, est mise en tampon comme unité d'informations (IU') qui provient
du second support de données (3').
3. Procédé de réception selon la revendication 2, dans lequel la première unité d'informations
de remplacement (RIU1) précédemment établie est remplacée par une seconde unité d'informations
de remplacement (RIU2) différente, la seconde unité de remplacement (RIU2) étant utilisée
à la place de l'unité d'informations (RIU) représentant la collision, comme unité
d'informations (IU') qui provient du second support de données (3').
4. Procédé de réception selon la revendication 3, dans lequel, à la suite de la présence
intégrale de toutes les unités d'informations (IU) qui proviennent du premier support
de données (3), une instruction de poursuite est générée et est émise sans contact,
au moyen de laquelle acheminement des unités d'informations (IU') des informations
d'identification (12) se poursuit au niveau du second support de données (3') avec
l'unité d'informations (IU') qui arrive après l'unité d'informations (IU') qui a précédemment
provoqué la détection de collision.
5. Procédé d'acheminement pour l'acheminement sans contact d'informations d'identification
(I1, 12), les informations d'identification (I1, 12) étant mémorisées dans un support
de données (3, 3') et pouvant être transmises sans contact à un appareil de communication
(2) sous la forme d'unités d'informations (IU, IU') à partir du support de données
(3, 3'), ledit procédé d'acheminement comportant les étapes décrites ci-dessous, à
savoir l'acheminement d'une unité d'informations (IU, IU') et le fait de contrôler,
après acheminement de l'unité d'informations (IU, IU'), qu'une première unité d'informations
de remplacement (RIU1) peut être reçue en provenance de l'appareil de communication
(2), la première unité d'informations de remplacement (RIU1) étant établie par l'appareil
de communication (2) pour servir d'unité d'informations (IU) qui provient d'un premier
support de données, ainsi que la poursuite d'acheminement des informations d'identification
(I1, 12), avec l'unité d'informations (IU, IU') qui suivant l'unité d'informations
(IU, IU') précédemment transmise à l'appareil de communication (2) si aucune première
unité d'informations de remplacement (RIU1) n'est reçue en provenance de l'appareil
de communication (2) ou bien si une première unité d'informations de remplacement
(RIU1) établie par l'appareil de communication (2) est reçue et que la première unité
d'informations de remplacement (RIU1) établie reçue est identique à l'unité d'informations
(IU, IU') précédemment transmise à l'appareil de communication (2).
6. Procédé d'acheminement selon la revendication 5, dans lequel l'acheminement des informations
d'identification (I1, 12) est interrompu si la première unité d'informations de remplacement
établie (RIU1) est reçue en provenance de l'appareil de communication (2) et qu'il
est établi que la première unité d'informations de remplacement reçue (RIU1) n'est
pas identique à l'unité d'informations (IU, IU') précédemment envoyée à l'appareil
de communication (2), et dans lequel est mémorisée au moins la position de l'unité
d'informations (IU, IU') qui suit l'unité d'informations (IU, IU') envoyée avant la
réception de la première unité d'informations de remplacement (RIU1).
7. Procédé d'acheminement selon la revendication 6, dans lequel, après réception d'une
instruction de poursuite provenant de l'appareil de communication, l'acheminement
des unités informations (IU, IU') des informations d'identification (I1, 12) se poursuit
avec l'unité d'informations (IU, IU') qui correspond à la position mémorisée.
8. Procédé anti-collision permettant de gérer une collision d'unités d'informations (IU,
IU'), lesdites unités d'informations (IU, IU') étant envoyées dans chaque cas à partir
d'un support de données (3, 3') vers un appareil de communication (2), et une collision
dans laquelle l'unité d'informations (RIU1) reçue au niveau de l'appareil de communication
(2) représente une occurrence simultanée des différentes unités d'informations (IU,
IU'), et parmi les différentes unités d'informations (IU, IU'), une unité d'informations
(IU) provient d'un premier support de données (3) et l'autre unité d'informations
(IU') provient d'un second support de données (3'), dans lequel le procédé anti-collision
comprend un procédé de réception conforme à l'une des revendications 1 à 4 et un procédé
d'acheminement conforme à l'une des revendications 5 à 7.
9. Circuit (4) d'appareil de communication destiné à un appareil de communication (2),
ledit appareil de communication (2) étant conçu pour une communication sans contact
avec un support de données (3, 3'), un support de données (3, 3') dans lequel sont
stockées des informations d'identification (I1, 12), lesquelles peuvent être reçues
sans contact à partir du support de données (3, 3') sous la forme d'unités d'informations
(IU, IU'), un premier moyen de réception (19) étant prévu, lequel est conçu pour la
réception sans contact d'une unité d'informations (RIU), et un moyen de détection
de collision (25) étant prévu, lequel est conçu pour détecter que l'unité d'informations
(RIU) reçue représente une collision entre deux unités d'informations différentes
(IU, IU') apparaissant simultanément, et, parmi les deux unités d'informations différentes
(IU, IU'), une unité d'informations (IU) provient d'un premier support de données
(3) et l'autre unité d'informations (IU') provient d'un second support de données
(3'), un moyen de remplacement (26) étant prévu, lequel est conçu pour remplacer l'unité
d'informations (RIU) reçue par une première unité d'informations de remplacement (RIU1),
la première unité d'informations de remplacement (RIU1) étant établie par l'appareil
de communication (2) pour servir d'unité d'informations (IU) qui provient du premier
support de données (3), ladite première unité d'informations de remplacement (RIU1)
étant utilisée à la place de l'unité d'informations (RIU) représentant la collision
et servant d'unité d'informations (IU) qui provient du premier support de données
(3), et un moyen d'acheminement (11) étant prévu, lequel est conçu pour l'acheminement
sans contact de la première unité d'informations de remplacement (RIU1) établie aux
premier et second supports de données.
10. Circuit d'appareil de communication (4) selon la revendication 9, dans lequel un moyen
de mise en tampon (28) d'unité d'informations est prévu, lequel est conçu pour mettre
en tampon chaque unité d'informations (RIU) pouvant être reçue au niveau de l'appareil
de communication (2), avant une détection de collision, comme unité d'informations
(IU') provenant du second support de données (3').
11. Circuit d'appareil de communication (4) selon la revendication 10, dans lequel le
moyen de remplacement (26) est conçu pour le remplacement répété de la première unité
d'informations de remplacement (RIU1) précédemment établie par une seconde unité d'informations
de remplacement (RIU2) différente, une seconde unité d'informations de remplacement
(RIU2) qui est utilisée à la place de l'unité d'informations (RIU) représentant la
collision comme unité d'informations (IU') qui provient du second support de données
(3').
12. Circuit d'appareil de communication (4) selon la revendication 11, dans lequel un
moyen de génération d'instruction de poursuite (12) est prévu, lequel est conçu pour
générer une instruction de poursuite, ladite instruction de poursuite pouvant être
délivrée avec l'assistance du premier moyen d'acheminement (11), et ladite instruction
de poursuite réalisant la poursuite de l'acheminement des unités d'informations (IU')
des informations d'identification (12) au niveau du second support de données (3')
avec l'unité d'informations (IU') qui arrive après l'unité d'informations (IU') qui
a précédemment provoqué la détection de collision.
13. Appareil de communication (2) comportant un circuit (4) d'appareil de communication
conforme à l'une des revendications 9 à 12.
14. Circuit (29, 29') pour un support de données (3, 3'), ledit support de données (3,
3') étant conçu pour une communication sans contact avec un appareil de communication
(2) dans lequel sont mémorisées des informations d'identification (I1, 12) d'un support
de données (3, 3'), lesquelles peuvent être transférées sans contact à partir du support
de données (3, 3') sous la forme d'unités d'informations (IU, IU') vers l'appareil
de communication (2), dans lequel un second moyen d'acheminement (42, 42') est prévu,
le second moyen d'acheminement (42, 42') étant conçu pour l'acheminement sans contact
d'une unité d'informations (IU, IU'), et dans lequel un moyen de contrôle (46, 46')
est prévu, le moyen de contrôle (46, 46') étant conçu pour contrôler si une première
unité d'informations de remplacement (RIU1) peut être reçue en provenance de l'appareil
de communication (2), la première unité d'informations de remplacement (RIU1) étant
établie par l'appareil de communication (2) après acheminement de l'unité d'informations
(IU, IU') pour servir d'unité d'informations (IU) qui provient d'un premier support
de données, et dans lequel le second moyen d'acheminement (42, 42') est conçu pour
poursuivre l'acheminement des informations d'identification (I1, 12) avec l'unité
d'informations (IU, IU') qui arrive après l'unité d'informations (IU, IU') précédemment
envoyée à l'appareil de communication (2) s'il est établi dans le moyen de contrôle
(46, 46') qu'aucune première unité d'informations de replacement (RIU1) établie n'est
reçue en provenance de l'appareil de communication (2) ou qu'une première unité d'informations
de remplacement (RIU1) établie par l'appareil de communication (2) est reçue et que
la première unité d'informations de remplacement (RIU1) établie reçue est identique
à l'unité d'informations (IU, IU') précédemment envoyée à l'appareil de communication
(2).
15. Circuit (29, 29') conforme à la revendication 14, dans lequel le second moyen d'acheminement
(42, 42') est conçu pour interrompre l'acheminement des informations d'identification
(I1, 12) s'il est établi dans le moyen de contrôle (46, 46') que la première unité
d'informations de remplacement établie (RIU1) reçue en provenance de l'appareil de
communication (2) n'est pas identique à l'unité d'informations (IU, IU') précédemment
envoyée vers l'appareil de communication (2), et dans lequel le second moyen d'acheminement
(42, 42') possède un moyen de mémorisation de position (51, 51') par lequel peut être
mémorisée au moins la position de l'unité d'informations (IU, IU') qui arrive après
l'unité d'informations (IU, IU') acheminée avant la réception de la première unité
d'informations de remplacement établie (RIU1).
16. Circuit (29, 29') conforme à la revendication 15, dans lequel un second moyen de réception
(37, 37') est conçu pour recevoir et détecter une instruction de poursuite, l'instruction
de poursuite pouvant être reçue sans contact en provenance de l'appareil de communication
(2), et dans lequel le second moyen d'acheminement (42, 42') est conçu pour poursuivre
l'acheminement des unités d'informations (IU, IU') des informations d'identification
(I1, 12) avec l'unité d'informations (IU, IU') qui correspond à la position indiquée
si la réception de l'instruction de poursuite est détectée au niveau du moyen de réception
(37, 37').
17. Support de données (3, 3') comportant un circuit (29, 29') conforme à l'une quelconque
des revendications 14 à 16.
18. Système de communication (1) destiné à une communication sans contact, dans lequel
est prévu un appareil de communication (2), qui possède un circuit d'appareil de communication
(4), conforme à l'une des revendications 9 à 11, et dans lequel est prévu au moins
un support de données (3, 3'), qui possède un circuit (29, 29'), conforme à l'une
quelconque des revendications 14 à 16.
REFERENCES CITED IN THE DESCRIPTION
This list of references cited by the applicant is for the reader's convenience only.
It does not form part of the European patent document. Even though great care has
been taken in compiling the references, errors or omissions cannot be excluded and
the EPO disclaims all liability in this regard.
Patent documents cited in the description